Store-stool.



No. 794,276. 'A PATENTED JULY 1l, 1905.

0. E. BOLLING.

STORE STOOL.

APPLIUATION FILED 121313.13. 1905.

Ummm STATES Patented July 11, 1905.

STORE-STOOL.

SPECIFICATION forming part of Letters Yatent No. 794,276, dated July 11, 1905,

Application filed February 13, 1905. Serial No. 245,371.

To 107./ 'llfl/om/ it 777,007/ con/067%:

Be it known that I, OT'ro E. ROLLING, a citi- Zen of the United States of America, and a resident of Chicago, inthe county of Cook and State of Illinois, have invented certain new and useful Improvements in Store-Stools, of which the following is a specification.

rIhis invention relates to that class of storestools in which the seat has a turning movement on its supporting-pedestal and is normally and automatically locked against rotation in the absence of an occupant; and the present improvement has for its object to provide a simple', durable, and efficient structural formation and combination of parts, whereby such automatic holding' of the seat against rotation is effectively attained, all as will hereinafter more fully appear and be more particularly pointed out in the claims.

In the accompanying drawings, Figure lis a side elevation of a store-stool to which the present improvement is applied. Fig. 2 is an enlarged detail central sectional elevation, partly on line .fn a', Fig. l. Fig. 3 is an enlarged detail horizontal section at line m' fr', Fig. 2.

Similar numerals of reference indicate like parts in the different views.

Referring to the drawings, lis a vertical column or rod provided with a reduced circular stem 2 at its upper end and with a floor or attaching plate 3 at its lower end to comprise the stationary pedestal of the stool.

l is the seat, on the under side of which is secured a spider 5 and to the central portion of which in turn is attached a central depending' circular housing 6, adapted to encircle the upper portion of the vertical column l and having a sliding iit at its lower end upon said post at a point below the central stem 2, as illustrated in Fig. 2.

7 is a collar having a sliding fit upon the upper end of the stem2 and held from a turning movement thereon by a radial pin or key 8 on one part engaging in a corresponding vertical way in the other part, the arrangement permitting of an independent vertical movement of the collar upon the stem.

9 is an annular bearing-collar carried on the upper surface of the collar 7, and l() is a counterpart bearing-collar attached to the up- 13 is an annular friction-ring of indurated fiber or like material and preferably of a triangular shape in cross-section secured to the under side of the bearing-washer ll. 14 is a complementary friction-ring of like material and shape in cross-section attached to the lower part of the housing 6 and having a sliding fit upon the upper part of the vertical column l.

The operation of the present mechanism is as follows: In the normal and unoccupied condition of the stool the spring' l2 forces the seat portion, with its attached housing 6, upwardly in relation to the stationary pedestal and brings the inclined surfaces of the friction-rings 13 and 14 into forcible frictional contact to resist rotation of the seat upon the pedestal. In an occupied condition of the stool the Weight of the occupant overcomes the upward stress of the spring l2, and the seat, with the housing' 6, is moved downward and causes a separation of the aforesaid :friction-rings to leave the seat free to rotate under the directions of the occupant.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a store-stool of character herein described, the combination of a stationary pedestal having a central stem at its upper end, a revoluble seat provided on itsunder side with a central depending housing adapted to encircle the upper end of the pedestal and have a sliding fit thereon, a collar having sliding movement upon the upper end of the stem aforesaid, a bearing-washer ixedly attached at the lower end of said stem, a coiled spring interposed between said collar and IOO 1 a revoluble seat provided on its under side with a central depending housing adapted to encircle the upper end of the pedestal and have a sliding fit thereon, a collar having sliding movement upon the upper end of the stem aforesaid, a bearing-washer iXedly attached at the lower end of said stem, a coiled spring interposed between said collar and ywasher, and complementary annular friction members triangular in cross-section carried on the under side of said washer and the adjacent portion ofthe depending housing aforesaid, substantially as set forth.

I 3. In a store-stool of the character herein described, the combination of a stationary pedestal having a central stem at its upper end, a revoluble seat provided on its under side with a central depending housing adapted to encircle the upper end of the pedestal and have a sliding lit thereon, a collar having a sliding movement upon the Lipper end of the stem aforesaid a pair of annular bearing-collars arranged above the collar aforesaid and provided with complementary annular runways for the reception of a series of balls, a bearing-washer iixedly attached at the lower end of said stem, a coiled spring interposed between the collar and washer aforesaid,'and complementary annular friction members upon the under side of said washer and the adjacent portion of the depending housing aforesaid, substantially 'as set forth.

4. In a store-stool of the character herein described, the combination of a stationary pedestal having a central stem at its upper end, a revoluble seat provided on its under side with a central depending housing adapted to encircle' the upper end of the pedestal and have a sliding fit thereon, a collar having a sliding movement upon the upper end of the stem aforesaid, a pair of annular bearing-collars arranged above the collar aforesaid and Icomplementary annular friction members triangular in cross-section carried on the under side of said washer'and the adjacent portion of the depending housing aforesaid, substantially as set forth. v

5. In a store-stool of character herein described, the combination of a stationary pedestal having a central stem at its upper end, a revoluble' seat provided on its under side with a central depending housing adapted to encircle the upper end of the pedestal and have a slidingfit thereon, a collar having sliding movement upon the upper end of the stem aforesaid, a bearing-washer fxedly attached at the lower end of said stem, a coiled spring interposed between said collar and washer, and complementary annular friction-rings of indurated fiber attached to the under side of said washer and the adjacent portion of the depending housing aforesaid, substantially as set forth.

6. In a store-stool of character herein described, the combination of a stationary pedestal having a central stem at its upper end, a revoluble seat provided on its under side with a central depending housing adapted to encircle the upper end of the pedestal and have a sliding tit thereon, a collar having sliding movement upon the upper end of the stem aforesaid, a bearing-washer fiXedly attached at the lower end of said stem, a coiled spring interposed between said collar and washer, and complementary annular friction-rings of indurated fiber attached to the under side of said washer and the adjacent portion of the depending housing aforesaid, the said friction-rings having a triangular form in crosssection, substantially as set forth.

Signed at Chicago, Illinois, this 9th day of February, 1905.

OTTO E. BOLLING. Vitnesses:

ROBERT BURNS, M. H. HOLMES. 

